Office (OLE) / .XLS malware analysis — malicious · a11c3b13c7f4a3f7

MALICIOUS

Office (OLE) / .XLS

646.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 36d0ab08e6d13427c73bb3bcf647974a SHA-1: f5c90bd4bc4245a020090e0716f1df6f47adbc14 SHA-256: a11c3b13c7f4a3f7fb760b9740a681ed05b2d071ca021a77e7121b49ab485233

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote loader. The embedded URL 'https://gacorbos.me/KoSPgA?&shift=dirty&motorcar=towering&cart=productive&rake=proud&lamp' is the target of this exploit. Although the VBA project contains no executable statements, the OLE vulnerability is sufficient to classify this as a malicious document.

Heuristics 2

OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199

Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes

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